Differ, B.J.M. 2021. The role of political formation in union struggle: Testimonies of the struggle of the Sindicato Nacional Revolucionario de los Trabajadores de Euzkadi in El Salto, Jalisco (1993–2005). Letras Históricas E-ISSN: 2448-8372. 25 (Nov. 2021). DOI:https://doi.org/10.31836/lh.25.7235.